一、1963年稻螟发生情况1963年浙江省水稻螟虫发生的特点是:发生期普遍提早;三化螟发生量浙东沿海与浙南地区普遍大于1962年,浙北、浙中地区普遍小于1962年;但第四代三化螟发生量普遍比1962年增加很多,除浙北地区外,为害晚稻,造成白穗,威胁空前严重。二化螟、大螟在全省大多数地区有上升趋势,特别是第一代威胁很大, I. Occurrence of rice borer in 1963 Zhejiang rice stem borers occurred in 1963, the characteristics of the occurrence of the general early; the occurrence of yellow rice borers in eastern Zhejiang and Zhejiang were generally greater than in 1962, Zhejiang, Zhejiang and Zhejiang Provinces generally less than 1962 Year; however, the incidence of the fourth generation of yellow rice borer generally increased much more than in 1962, except for the northern part of Zhejiang Province, the damage to late rice, resulting in white spike, an unprecedented threat. Stem Borer, Sesamia in the province in most parts of the upward trend, especially the first generation of a great threat,